Used error tolerant loading in FileMenu operations.
Used error tolerant loading in FileMenu operations.

Errors are reported to the user via a dialogue, but the file is no longer prevented from loading.

Fixes #746.

appleseedhq/gaffer,appleseedhq/gaffer,hradec/gaffer,lucienfostier/gaffer,ivanimanishi/gaffer,chippey/gaffer,appleseedhq/gaffer,appleseedhq/gaffer,johnhaddon/gaffer,GafferHQ/gaffer,lucienfostier/gaffer,lucienfostier/gaffer,ivanimanishi/gaffer,GafferHQ/gaffer,ImageEngine/gaffer,cedriclaunay/gaffer,cedriclaunay/gaffer,andrewkaufman/gaffer,ivanimanishi/gaffer,hradec/gaffer,boberfly/gaffer,lucienfostier/gaffer,hradec/gaffer,boberfly/gaffer,johnhaddon/gaffer,johnhaddon/gaffer,andrewkaufman/gaffer,ImageEngine/gaffer,chippey/gaffer,goddardl/gaffer,hradec/gaffer,goddardl/gaffer,johnhaddon/gaffer,andrewkaufman/gaffer,ImageEngine/gaffer,boberfly/gaffer,GafferHQ/gaffer,GafferHQ/gaffer,goddardl/gaffer,goddardl/gaffer,chippey/gaffer,hradec/gaffer,chippey/gaffer,andrewkaufman/gaffer,andrewkaufman/gaffer,GafferHQ/gaffer,johnhaddon/gaffer,cedriclaunay/gaffer,ImageEngine/gaffer,boberfly/gaffer,ivanimanishi/gaffer,cedriclaunay/gaffer